Morton Neuroma in Kathmandu: Forefoot Numbness, Mulder Click, and Treatment Choices

<p>Morton neuroma describes an enlarged, fibrotic interdigital nerve, most often between the third and fourth metatarsals, where the nerve is subject to compression beneath the deep transverse metatarsal ligament and repetitive loading during propulsion. Patients describe burning, tingling, or numbness into the adjacent toes, and a sense of a pebble or fold of sock under the forefoot that worsens in narrow or high-heeled shoes and improves when barefoot or after removing shoes and massaging the foot. In Kathmandu where tight formal shoes are worn for work and distance walking is common, forefoot compression often unmasks symptoms. Dr. Bodh Raj Gautam (NMC 23071, MBBS KU, MS Orthopedics) evaluates forefoot dysesthesias by site, shoe and activity pattern, and reproducible compression tests rather than by imaging alone.</p> <h2>How the nerve becomes symptomatic</h2> <p>The interdigital nerve travels plantar to the ligament that binds the metatarsal heads. Repetitive compression and shear during push-off, especially with a constricted forefoot, produce perineural fibrosis and demyelination that can generate electric or burning dysesthesia. The third web space is most often cited because the communicating branch from the lateral plantar nerve makes the nerve thicker there, though the second web space is also frequently affected. Contributors include narrow toe boxes, high heels that transfer load forward, tight lacing over the midfoot, and activities with repetitive forefoot loading. Anatomical variation in metatarsal length and intermetatarsal bursa size may increase vulnerability. Evidence does not support that a single long walk alone creates a true neuroma; rather, repeated compression over time with footwear that crowds the forefoot drives symptoms.</p> <h2>Clinical presentation and bedside tests</h2> <p>History localizes pain and paresthesia to one interdigital space with radiation into the adjoining toes, often with relief within minutes of offloading and worsening within minutes of wearing narrow shoes. Examination checks for direct tenderness in the web space, sensory changes between the toes compared with neighboring spaces, and callus pattern. Key clinical maneuvers include the Mulder click: squeezing the metatarsal heads together while pressing the painful web space dorsally may produce a painful click as the enlarged nerve slides. The squeeze test reproduces pain by compressing the forefoot transversely. These signs are sensitive but not perfectly specific; a painful metatarsal stress fracture, bursitis, metatarsal synovitis, or capsulitis of the second metatarsophalangeal joint can overlap in location and must be considered when pain is primarily dorsal or associated with a swollen joint.</p> <h2>Differential diagnosis that changes next steps</h2> <p>Forefoot pain that is dorsal and associated with a swollen second metatarsophalangeal joint, pain with dorsal metatarsal palpation, or swelling after an activity burst points toward stress injury or synovitis rather than neuroma. Burning that is bilateral and stocking in distribution suggests peripheral neuropathy rather than a focal interdigital nerve. Numbness that improves after shaking the foot rather than after shoe removal leans away from compressive neuroma. When symptoms are classic and examination reproduces a discrete web-space click, imaging may be used to confirm and to plan injections rather than to make the diagnosis alone. Ultrasound with real-time squeeze maneuver can demonstrate a hypoechoic mass that moves plantarly with compression, while magnetic resonance imaging shows a well-defined lesion but may detect incidental intermetatarsal bursae in asymptomatic feet, so correlation with examination remains essential.</p> <h2>Conservative care with the strongest support</h2> <p>First-line care targets pressure reduction:</p> <ul> <li>Wide, soft toe box shoes with adequate metatarsal length, lower heel height, and lacing that secures the midfoot without strangling the forefoot. In work settings that require formal shoes, alternating with a roomy walking shoe on commute days protects the forefoot.</li> <li>Metatarsal pads or domes placed proximal to the metatarsal heads to splay the metatarsals and widen the space around the nerve, plus evaluation for over-the-counter orthoses if pronation overload drives forefoot pressure.</li> <li>Activity modification that temporarily reduces narrow-shoe hours and hill or court play that increases forefoot loading, combined with intrinsic foot muscle conditioning and calf flexibility.</li> <li>Short trials of nonsteroidal anti-inflammatory drugs for analgesia, with recognition that they do not shrink neural fibrosis.</li> </ul> <p>Adherence over 6 to 12 weeks, not days, determines whether footwear and padding work. Keeping a short diary of shoe type, hours worn, and symptom onset helps individualize advice far better than a single recommendation.</p> <h2>Injection and surgical options with evidence context</h2> <p>When comprehensive shoe and pad measures are insufficient, ultrasound-guided corticosteroid injection into the web space may reduce perineural inflammation and provide weeks to months of relief, with repeat injection considered judiciously due to fat pad atrophy and skin thinning. Ultrasound-guided alcohol or radiofrequency ablation has been reported to reduce pain in case series, but higher-quality comparative data are limited, so expectations and recurrence risk are discussed transparently. Surgical excision of the neuroma through a dorsal approach is offered when conservative care and considered injection pathways have not provided durable function, or when paresthesia is disabling. Neurectomy typically relieves web-space pain but leaves permanent numbness in the affected toe cleft, and a stump neuroma remains a small but important risk. Ligament release techniques that preserve the nerve are under investigation; long-term comparative outcomes are still maturing, so patient selection is conservative.</p> <p>At follow-up, Dr. Gautam rechecks Mulder and squeeze responses, footwear fit with an in-shoe pressure sense, and numbness distribution between toes to stage next steps and to exclude a metatarsal or joint source that would follow a different pathway. Bring your most and least comfortable shoes and a note of when symptoms peak during the day to improve precision. This content is educational and does not replace direct orthopedic evaluation.</p>